ISO 17450-1:2011提供了几何规范和验证的模型，并定义了相应的概念。它还解释了与模型相关概念的数学基础，并定义了工件几何特征的一般术语。 ISO 17450-1:2011定义了GPS系统的基本概念，以提供在设计、制造和验证中使用的无歧义GPS语言，识别特征、特征和规则，为规范提供基础，提供完整的符号语言来指示GPS规范，通过定义默认规则提供简化的符号，并为验证提供一致的规则。

ISO 17450-1:2011 provides a model for geometrical specification and verification and defines the corresponding concepts. It also explains the mathematical basis of the concepts associated with the model and defines general terms for geometrical features of workpieces. ISO 17450-1:2011 defines the fundamental concepts for the GPS system in order to provide nonambiguous GPS language to be used in design, manufacturing and verification, to identify features, characteristics and rules to provide the basis for specifications, to provide a complete symbology language to indicate GPS specifications, to provide simplified symbology by defining default rules, and to provide consistent rules for verification.